Two-revolution cylinder printing-press.



No. 812,632. PATENTED FEB. 13, 1906. B. F. BERRY.

TWO REVOLUTION CYLINDER PRINTING PRESS.

APPLIOATION FILED DEG.17, 1904.

Jar

UNITED STATES PATENT OFFICE.

BENJAMIN F. BERRY, OF ST. LOUIS, MISSOURI, ASSIGNOR TO UNITED PRINTINGMACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATION.

TWO-REVOLUTION CYLINDER PRINTING-PRESS.

Specification of Letters Patent.

Patented Feb. 13, 1906.

Application filed December 1'7. 1904:. Serial No. 237,194:-

To all whom it nwty concern.-

Be it known that I, BENJAMIN F. BERRY, a citizen of the United States,residing in the city of St. Louis, in the State of Missouri, haveinvented certain new and useful Improvements in Two Revolution CylinderPrinting-Presses, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification.

In the use of two-revolution cylinder printing-presses, as in .otherforms of printingpresses, it is common practice to pack theimpression-cylinder with sheets of paper to compensate for theunevenness of the type or form printed from or for the existence of lowtype among higher type, all of which are car ried by the bed of thepress. This packing has the efiect of increasing the diameter of theimpression cylinder, and as a consequence the periphery of the cylinderdoes not rotate in proper conformity to the positivelydriven bed asprovided for in the original construction of the press and a draggingeffect is produced upon the type .or form, due to which the printingaccomplished is blurred and imperfect.

My invention relates to means whereby a limited degree of play may berendered present in the driving -gear associated with the spindle of thecylinder of a two-revolution printingpress during the printing action ofthe press, thereby rendering it possible for the press cylinder andbedto travel in harmony with each other without the printing action beinginterferedwith due to conflict between the gearing engagement of thecylinder and bed and the cylinder driving gear. The improvement alsoembodies means by which the cylinderdriving gear is intermittently heldfrom play with respect to the cylinder-spindle during the period ofsecuring mesh of the cylinder and bed gear members.

By my improvement I secure in a two-revolutionprinting-press the meritsof a stopcylirilder printing-press with greater printing spee Figure Iis an end elevation of part of the printing-press with my improvementapplied thereto, with parts broken away to afford an unobstructed viewof parts at the rear there of. Fig. II is a vertical section taken online II II, Fig. III, looking in the direction of the .arrow at saidline, with parts at the rear of the line shown in elevation. Fig. III isa vertical longitudinal section taken through the press-gearing andshowing oneend of the cylinder in elevation. Fig. IV is a verticalsection taken on line IV IV, Fig. III, looking in the direction of thearrow at said line, with partsbeyond the line shown in elevation. Fig. Vis an enlarged cross-section taken on line V V, Fig. IV. Fig. VI is aperspective view of the crank-arm fixed to the cylinder-spindle andassociated with tho cylinder-driving gear-wheel.

1 designates part of the frame of a printingpress, in which are seateduprights 2, that are provided with j ournal-boxes 3, in which thespindles of the press-cylinder are positioned.

4 designates the reciprocating bed of the press, which is provided withthe usual rack 5.

6 designates the press cylinder, having spindles 7 that are journaled inthe boxes 3.

8 is a gear-wheel fixed to one of the cylinder-spindles and arranged inmesh with the bed-rack 5.

The parts thus far described are common to printing-presses as atpresent in use, and no invention per se is herein claimed for them.

9 designates (see Fig. III) a power-wheel which is driven from anysuitable source.

10 is a cylinder-driving gear-wheel that is arranged in mesh with thepower-wheel 9 and is provided with an aperture 11.

12 designates a crank-arm having a collar 13, by which it is keyed tothe cylinder-spindle 7 (illustrated in the drawings) and on which thecylinder-driving gear-wheel 10 is loosely mounted. The crank-arm 12 isprovided with an extension 14, (see Figs. III, IV, and V1,) that is ofless width in cross-section than the cross-section of the aperture 11 inthe cylinder-driving gear-wheel, within. which said extension fits. Dueto this variation a limited degree of play in the cylinder-drivinggear-wheel is permitted in either forward or reverse rotation of saidwheel when the extension is free of restraint in the aperture 11.

At the inner side ofthe cylinder-driving gear-wheel 10 are guides 15.Between these guides is slidably positioned a locking member 16, that isadapted for movement toward and away from the crank-arm extension 14, sothat it may engage said extension or be withdrawn therefrom to eitherhold the cylinder-driving gear-wheel fixed with relation to thecrank-arm 12 or free to partake of a limited degree of play with respectto said crank-arm. The locking member 16 is normally held separated fromthe extension 14 of said crank-arm by springs acting thereagainst andforcing the locking member toward the axis of the gear-wheel 10. The srings may be placed in the positions of t ose indicated at 17, Fig. IV.

18 is a roller or button projecting from the locking member 16 andadapted to travel in a circular path with the locking member and thegear-wheel, by which it is carried.

19 designates an upper cam mounted upon the upright 2 of the pressadjacent to the cylinder-driving gear-wheel 10 and in the path ofcircular travel of the locking-1nember roller 18, so that said rollerwill strike thereagainst at a certain period during its travel. 20 is alower cam also mounted upon the up right 2 adjacent to the upper cam 19and adapted to be engaged by the locking-member roller 18 immediatelyafter said roller moves away from the upper cam in the continuance ofits movement.

In the practical use of a printingpress equipped with my improvement theoperation of the parts is as follows: It will be assumed that the rackof the bed 4 and the gear-wheel 8, fixed to the cylinder-spindles, arefree of mesh, which is the condition previous to the printing action.The drivinggear of the press being set in motion, the press-bed 4 iscaused to approach a position beneath the cylinder, and at the same timethe power-wheel 9 acts'to rotate the gearwheel 10. As the gear-wheelrotates the looking member 16 moves into juxtaposition with the uppercam 19, so that its roller 18 will engage said cam. The locking memberis so positioned upon the gear-wheel 10 that the roller 18 will comeinto engagement with the cam 19 immediately before the forward end ofthe rack 5 is brought to the teeth of the gear-wheel 8, with. which itsubsequently meshes. When the locking-member roller rides intoengagement with the cam 19, pressure is exerted thereagainst to forcethe locking member outwardly from the position seen in full lines, Fig.IV, to the position seen in dotted lines, Fig. IV, thereby causing thelocking member to engage the extension 14 of the crank-arm 12, as aresult of which the gear-Wheel 10 is held from movement with respect tosaid crank-arm and caused to travel positively therewith Withoutindependent movement. As a consequence the gear-wheel 10, being lockedto the crank-arm 12, is caused'to drive the cylinder-spindles 7positively, and the gear-wheel 8, fixed to the cylinder-spindle, ispositively rotated until the last-named gear-wheel has entered partiallyinto mesh with the rack of the bed 4. The cam 19 is of such extent as tomaintain the locking member in its outwardly-pressed position and inengagement with the crank-arm 12 only a suflicient length of time toprovide for initial meshing of the gear-Wheel 8 with the bed-rack, andas soon as the roller of the locking member moves away from the cam 19it passes'above the cam 20 and into engagement therewith. When thelocking-member roller rides onto the lower cam, it is gradually carriedtoward the cylinder-spindles 7, with the result that the locking memberis Withdrawn from the extension 14 of the crank-arm 12, thereby againfreeing said extension to permit of its partaking of limited play withinthe aperture 11 in the gear-wheel 10. From the foregoing it will be seenthat each time that the cylinder 6 and bed 4 are placed into drivingengagement with each other through the medium of the bed-rack andgear-wheel 8 the cylinder-driving gearwheel 10 is locked positively tothe cylinderspindle 7 in a sufficient period of time to rovide for thequick and positive intermesfiing of the rack and gear-wheel 5 and 8.Immediately thereafter the cylinder-driving gearwheel 10 is releasedfrom positive driving connection to the cylinder-spindle, due to thewithdrawal of the locking member 16 from the extension of the crank-arm12, thereby permitting play of said driving gear-wheel on the collar ofthe crank-arm. As a consequence, although the cylinder-driving gearwheelcontinues to have rotation imparted thereto by the intermeshingpower-wheel 9 the press-bed 4 is permitted to impart rotation to thepress-cylinder during the rearward reciprocation of said bed, so thatsaid parts move in absolute unison without conflict between theengagement of the cylinder with the bed and the cylinder-driving gear.

I claim as my invention 1. In a cylinder printing-press, the combinationof a cylinder, a bed adapted to move into driving connection with saidcylinder, a driving member loosely associated with a spindle of saidcylinder, a member fixed to said spindle and loosely fitted to saiddriving member, locking means adapted to connect said driving member andthe member fixed to said spindle, and means for alternately shiftingsaid locking means into and out of action, substantially as set forth.

2. In a cylinder printing-press, the combination of a cylinder, a bedadapted to move into driving connection with said cylinder, a drivingmember loosely associated with a spindle of said cylinder, a memberfixed to said spindle and loosely fitted to said driving member, lockingmeansladapted to connect said driving member and the member fixed tosaid spindle, and a cam with which said locking means engages to causeit to be shifted into locking action, substantially as set forth. I v

3. In a cylinder printing-press, the combination of a cylinder, a bedadapted to move into driving connection with said cylinder, a drivingmember loosely associated with a spindle of said cylinder, a memberfixed to said spindle and loosely fitted to said driving member, springcontrolled locking means adapted to connect said driving member and themember fixed to said spindle, and means whereby said locking means isshifted against the action of the springs controlling it, substantiallyas set forth.

4. In a cylinder printing-press, the combination of a cylinder, a bedadapted to move into driving connection with said cylinder, a drivingmember loosely associated with a spindle of said cylinder, a memberfixed to said spindle and loosely fitted toisaid driving member, lockingmeans adapted to connect said drivingmember and the member fixed to saidspindle, and cams arranged to shift said locking means into lockingaction and out of locking action, substantially as set forth.

5. In a cylinder printing-press, the combination of a cylinder, a bedadapted to move into driving connection with said cylinder,'a crank-armfixed to a spindle of said cylinder, a loosely-mounted gear-wheel towhich said crank-arm is loosely fitted, a locking member carried by saidgear-wheel and adapted to engage said crank-arm to hold said crankarmand gear-wheel rigidly united, and means for moving said locking memberto free said gear-wheel from said crank arm, substantially as set forth.

6. In a cylinder printing-press, the combination of a cylinder, a bedadapted to move into driving connection with said cylinder, a crank-armfixed to a spindle of said cylinder, a loosely mounted gear wheelassociated with said spindle and provided with an aperture adapted toreceive said crank-arm, a locking member carried by said gear-wheel andadapted to engage said crank-arm, and means for moving said lockingmember to and away from said crank-arm, substantially as set forth.

7. In a cylinder printing-press, the combination of a cylinder, a bedadapted to move into driving connection with said cylinder, a crank-armfixed to a spindle of said cylinder, a loosely mounted gear wheelassociated with said spindle and provided with an aperture adapted toreceive said crankarm, a locking member carried by said gear-wheel andadapted to engage said crank-arm, and cams arranged to receive theengagement of said locking member to move it to and away from saidcrankarm, substantially as set forth.

8. In a cylinder printing-press, the combination of a cylinder, a bedadapted to move into driving connection with said cylinder, a crank-armfixed to a spindle of said cylinder and provided with a finger, a gearwheel loosely associated with said spindle and provided with an apertureto receive said crankarm finger that is of reater dimensions than saidfinger to permit eedom of movement of the finger therein, aspring-controlled lockin member movably fitted to saidgear-whee l andarranged for engagement with said crankarm finger, and a cam locatedadjacent to said locking member arranged to be engaged by said lockingmember to move said member to said crank-arm finger, substantially asset forth.

BENJAMIN F. BERRY. In presence of NELLIE V. ALEXANDER BLANOHE HOGAN.

